The correct answer is A. Stingy
Step-by-step explanation:
In language, the connotation of a word refers to the ideas, images, concepts people have about some word and that can differ from their literal or dictionary meaning. In this way, in a dictionary, words with the same meaning can have a positive connotation, a neutral connotation or a negative connotation. In the case of the words presented all of the words frugal, prudent, thrifty and prudent in the dictionary are adjective that defines someone who careful spares money or does not like to spare a lot of money. However, while thrifty, frugal and prudent have mainly a positive or neutral connotation of someone that knows how to spend money and avoid spending money excessively, the word stingy has a negative connotation as it is related with someone unwilling to spend money or not generous which is not adequate. Therefore, the word with the most negative connotation is stingy.